Troubleshooting
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
1. Flame too large.
A. Pressure regulator set
too high.
Reset, using manometer.
B. Defective regulator.
Replace.
C. Burner orifice too
large.
Replace with correct size.
2. Noisy flame.
A. Too much primary air.
See Item 1.
B. Noisy pilot.
Reduce pilot gas.
C. Burr in orifice.
Remove burr or replace.
3. Yellow tip flame.
A. Too little primary air
Look for obstructions in air path.
B. Clogged burner ports.
Clean ports.
C. Misaligned orifices.
Realign or replace burner.
D. Clogged draft hood.
Clean.
4. Floating flame.
A. Blocked venting.
Clean.
B. Insufficient primary
air.
Look for obstructions in air path.
5. Delayed ignition.
A. Improper pilot
location.
Reposition pilot.
B. Pilot flame too small.
Check orifice, increase gas.
C. Burner ports clogged.
Clean ports.
D. Low pressure.
Adjust pressure regulator.
6. Failure to ignite.
A. Main gas off
Open manual valve.
B. Defect in gas valve.
Replace.
C. Defective thermostat.
Replace.
7. Burner won't turn
off.
A. Poor thermostat
location.
Relocate thermostat.
B. Defective thermostat
or wiring.
Replace or repair.
C. Defective control
valve.
Clean or replace.
8. Rapid burner
cycling.
A. Poor thermostat
location.
Relocate.
B. Defective thermostat.
Replace.
9. Burner won't turn
on.
A. Defective control
valve.
Replace.
B. Defective
thermocouple.
Replace.
C. Defective thermostat.
Repair or replace.
D. Defective limit switch.
Replace.
10. Not enough heat.
A. Thermostat set too
low.
Raise setting.
B. Appliance close to
thermostat.
Move heat source away.
C. Thermostat in bad
location.
Relocate thermostat.
D. Thermostat out of
calibration.
Recalibrate or replace.
11. . Too much heat.
A. Thermostat set too
high.
Lower setting.
B. Thermostat out of
calibration.
Recalibrate or replace.
C. Valve sticks open.
Replace valve.
D. Thermostat in draft.
Relocate thermostat.
